package com.tanhua.dubbo.server.service;

import cn.hutool.core.util.StrUtil;
import cn.hutool.http.HttpRequest;
import cn.hutool.http.HttpResponse;
import cn.hutool.json.JSONObject;
import cn.hutool.json.JSONUtil;
import com.tanhua.dubbo.server.config.HuanXinConfig;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

@Service
@Slf4j
public class TokenService {

    @Autowired
    private RedisTemplate<String,String> redisTemplate;

    @Autowired
    private HuanXinConfig huanXinConfig;

    private static final String REDIS_KEY = "HX_TOKEN";

    //获取token，先查询redis，如果没有则去环信接口获取
    public String getToken(){
        //redis
        String token = redisTemplate.opsForValue().get(REDIS_KEY);
        if(StrUtil.isNotEmpty(token)){
            return token;
        }

        //环信
        return refreshToken();
    }

    public String refreshToken(){
        String targeUrl = huanXinConfig.getUrl() + huanXinConfig.getOrgName() + "/" + huanXinConfig.getAppName() + "/token";
        Map<String,Object> param = new HashMap<>();
        param.put("grant_type", "client_credentials");
        param.put("client_id",huanXinConfig.getClientId());
        param.put("client_secret",huanXinConfig.getClientSecret());

        HttpResponse response = HttpRequest.post(targeUrl).body(JSONUtil.toJsonStr(param)).timeout(20000).execute();

        if(!response.isOk()){
            log.error("token刷新失败---");
            return null;
        }

        String body = response.body();
        JSONObject jsonObject = JSONUtil.parseObj(body);
        String token = jsonObject.getStr("access_token");
        if(StrUtil.isNotEmpty(token)){
            //存入到redis中并提前一小时让token失效
            long timeout = jsonObject.getLong("expires_in") - 3600;
            redisTemplate.opsForValue().set(REDIS_KEY,token,timeout, TimeUnit.SECONDS);
            return token;
        }
        return null;

    }
}
